What should a therapist recommend if they notice a change in ETCO2?

When a therapist notices a change in ETCO2 (end-tidal carbon dioxide), it indicates a change in a patient's respiratory status or ventilatory efficiency. Conducting an arterial blood gas (ABG) test is the most appropriate action because it provides a comprehensive assessment of the patient’s acid-base balance and gas exchange. The ABG test can accurately determine the levels of carbon dioxide, oxygen, and bicarbonate in the blood, enabling the therapist to understand the underlying cause of the ETCO2 change.

Changes in ETCO2 could suggest hypercapnia (increased CO2) or hypocapnia (decreased CO2), which may require different interventions depending on the patient's condition. Through the ABG test, the therapist can gather critical information that informs the treatment plan and ensures appropriate management of the patient’s respiratory status.

Other options may not fully address the underlying issue. For instance, continuing to monitor without taking action could delay necessary interventions that might be crucial for the patient's well-being. Administering oxygen immediately might not be appropriate if the cause of the ETCO2 change is not determined, as it could exacerbate the situation. Increasing the patient’s ventilation rate may also be inappropriate without understanding the specific respiratory compromise evidenced by the ETCO